THE PERFORMANCE OF A SPARK-IGNITION ENGINE FUELLED WITH NATURAL GAS AND GASOLINE

An experimental evaluation has been made of the power output, specific fuel consumption and thermal efficiency of a modern 4 cylinder spark ignition engine operating on gasoline and natural gas. Tests have been conducted at various speeds, spark advance angles and airfuel ratios, all at wide open throttle. Performance on gasoline and natural gas has been compared and optimum spark advance determined for natural gas operation. With natural gas operation, brake power was found to decrease by between 11.3% and 16.6% compared to gasoline operation. Brake specific fuel consumption was found to decrease with natural gas operation, although this is due to the higher calorific value of natural gas. In terms of brake thermal efficiency, operation with natural gas was found to be less efficient than with gasoline. This is due to the lower flame speed of natural gas and the proportionally higher friction losses at the reduced power levels.

  • Availability:
  • Supplemental Notes:
    • International Congress and Exposition, Detroit, Michigan, February 27-March 2, 1984.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Evans, R L
    • Goharian, F
    • HILL, P G
  • Publication Date: 1984

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00394237
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: SAE 840234, HS-038 111
  • Files: HSL, USDOT
  • Created Date: May 31 1985 12:00AM